A 28-year-old man, arrested after a fire on board a ferry to the Netherlands, has been bailed.
He was questioned on suspicion of affray after a fire in a cabin on the DFDS MS King Seaways on Saturday night.
A 26-year-old man, arrested on suspicion of arson, remains in police custody.
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Durham Police say four women and one man have been arrested and two people remain up a tree at the Pont Valley opencast demonstration.
Durham Constabulary have called in a specialist climbing team to help remove protesters at the Pont Valley site.
Residents of a 495-property housing estate in Newton Aycliffe are split over proposals to demolish and rebuild the site.